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  #1  
Old 25-05-2009, 10:47 PM
mjb mjb is offline
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Lightbulb chain driven diff !!!!!!

has any1 made a " home made version " of a chain driven diff , i went to the trike shop 2 enquire about there conversion kit , a bit to pricey 4 me !! so i decided 2 make my own i have started maching a lump of ally to take a sierra axle , i think im getting there , just wanted to no if any1 else has been thro this cos it seems 2 b a closely guarded secret !!
hopefully i should have it done in next couple of weeks , fingers crossed it might work , any help would be appreciated ,
thanks ,
marcus .
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Old 25-05-2009, 11:30 PM
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I think reliant diffs are the favourite thing for converting to chain drive, failing that another option is to put a bevel drive off a shaft drive motorbike where the sprockett normally goes on chain drive engine (effectively making it shaft drive, or even using a shaft drive motorcycle engine, what engine are you planning on using? and why? might be better to go for a shafty motor...........
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Old 25-05-2009, 11:48 PM
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i got an old gsxf 600 lying about , been in my shed 4 8 years !! ive allways wanted 2 keep it and allways said i would build a trike 1 day .
i got use of a machine shop and have been thinking of making my own chain drive axle 4 a while , my plan is 2 have the sprocket and original brake disc mounted 2 the diff , i have seen pictures of these but you can only see bits of it thats why i wondered i f any1 had done a diy job .
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Old 25-05-2009, 11:57 PM
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I'll be interested to see the results I think there was something like what your describing on here recently under the heading 'nice' might be of interest
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Old 26-05-2009, 08:20 AM
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Default chain diff

picture as you go would be good
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Old 26-05-2009, 10:53 AM
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I have built a chain drive diff using the diff , sideplates and driveshafts etc off a irs vw beetle ,pretty much involved removing the diff and welding the oil holes up filling the diff with cv grease and just replacing the gearbox casing with flat plate and spacers
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Old 26-05-2009, 07:45 PM
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Quote:
Originally Posted by mjb View Post
i got an old gsxf 600 lying about , been in my shed 4 8 years !! ive allways wanted 2 keep it and allways said i would build a trike 1 day .
i got use of a machine shop and have been thinking of making my own chain drive axle 4 a while , my plan is 2 have the sprocket and original brake disc mounted 2 the diff , i have seen pictures of these but you can only see bits of it thats why i wondered i f any1 had done a diy job .



thats a long time to keep it...lol
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Old 27-05-2009, 08:34 PM
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hahaha:thumbsu: , for 8 yrs !!
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Old 27-05-2009, 08:38 PM
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Quote:
Originally Posted by dubmeister View Post
I have built a chain drive diff using the diff , sideplates and driveshafts etc off a irs vw beetle ,pretty much involved removing the diff and welding the oil holes up filling the diff with cv grease and just replacing the gearbox casing with flat plate and spacers
never thought of that !!!
i didnt think the diff would be able to be welded ,
sounds easier than wot im trying to do
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Old 27-05-2009, 08:41 PM
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Quote:
Originally Posted by matthewmosse View Post
I'll be interested to see the results I think there was something like what your describing on here recently under the heading 'nice' might be of interest
'nice' , looks good but cant see any detail
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Old 27-05-2009, 08:45 PM
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Quote:
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picture as you go would be good
already half way thro , i will try and put some pics on tomorrow .
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Old 28-05-2009, 04:13 PM
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Chris Ireland has done a few, may be worth a look on Brit Chopper and search the threads
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Old 28-05-2009, 09:28 PM
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Default Chain Driven Diff

HI Guys !!!
a good mate of mine (now deceased) built a triumph bonnie hardtail trike with a chain drive to the diff .....basicaly he kept the original chain to the rear sprocket still mounted in the swing arm thro a moving spindle with a same size sprocket mounted in line with the diff centre..which had a sprocket welded to it...it worked a treat and won him best engineering at
KENT......way back in the 70s.........rode it all the way from KILMARNOCK to
KENT and back.....it were called CHAIN REACTION......dont have any pics of the setup but could draw a ruff sketch by email.....
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Old 28-05-2009, 09:55 PM
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Originally Posted by hardtailbiker View Post
Chris Ireland has done a few, may be worth a look on Brit Chopper and search the threads
some good pics
thats the same type that im doing , wish id seen them months ago would have saved some head scratching !
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  #15  
Old 30-05-2009, 10:43 PM
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Default pics

still a bit of maching left to do !!!
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Old 31-05-2009, 05:06 PM
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anyone now if the brake on the diff would fail the mot ?
do they test the rear brakes together or individually ?

just had a horrible thought about it , if one of the wheels lifted during braking the brake becomes useless ?

any answers anyone ?
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Old 31-05-2009, 05:36 PM
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Sure that setups been done before bud. At mot they test each wheels braking effort independantly on rolling road rollers. Cant see it being a problem tbh.
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Old 01-06-2009, 09:36 AM
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I've seen single brake dish on prop shaft of a trike before, plus Landrover series have the handbrake on the transmition
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Old 02-06-2009, 10:10 AM
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Ok , i'll do a bit more machining and hopefully get it done 2nite
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  #20  
Old 02-06-2009, 10:59 PM
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Default more pics

simple !!!!
hope u like
sierra diff modified to take different bearings and trimmed a bit to make it smaller
it took a few hours but it looks ok
also started making another diff an easier way and it will be smaller , i will put pics on soon
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Old 04-06-2009, 04:42 PM
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Very nice, and a lot less expensive than these!

http://www.westgarage.co.uk/forsale/kits/kit2.html
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Old 05-06-2009, 08:27 PM
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LOVELY JOB MATE WELL DONE

Alfie B
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Old 05-06-2009, 08:34 PM
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Very nice work
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  #24  
Old 06-06-2009, 02:44 PM
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ive made another one , got it for sale on ebay 200 reserve , if it sells i might make a few more , can do it a lot cheaper than the first one i made that cost me 85 just for a lump of ally , can be made from most diffs if anyone wants one made
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  #25  
Old 03-07-2009, 01:14 PM
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finished it , looks good
sold it for 300
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  #26  
Old 04-10-2010, 08:50 PM
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Default chain diff

Well done on the chain diff it looks awesome, are you still selling them at all. I'm a new member and i'm just planning my ducati trike, my main problem was the diff as the quaife ones are unbeleiveably priced.
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  #27  
Old 06-10-2010, 08:28 PM
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Quote:
Originally Posted by harris View Post
Sure that setups been done before bud. At mot they test each wheels braking effort independantly on rolling road rollers. Cant see it being a problem tbh.
I think it will fail an MOT. The braking effort is distributed between the two wheels BUT there is an effect which will render the brake useless.

In the same way that a diff will allow one wheel to spin the single brake disc will allow one wheel to lock up. This will mean as soon as one wheel locks up there is no braking effort whatsoever.

Even worse, this will tend to happen on a turn where the wheel speeds are different so the braking effort is different from one side to the other.

The hand brake is not the same because the wheels are stationary.
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Old 06-10-2010, 09:28 PM
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Quote:
Originally Posted by mjb View Post
anyone now if the brake on the diff would fail the mot ?
do they test the rear brakes together or individually ?

just had a horrible thought about it , if one of the wheels lifted during braking the brake becomes useless ?

any answers anyone ?
This set up would not pass MSVA as the regs require service brakes to be directly connected to the wheel through components unlikely to fail.

Chains drive shafts and diffs come under this category.

MOT is dubious as the examiner goes by condition .... so if he thinks it might break rather than brake ?

Some roller brake testers only turn one roller at a time so the other may turn backwards and the brake won't work like that.

I don't like this type of brake, cos theres too much to go wrong. And yup if one wheel lifts when cornering you aint got any brakes at all.

Bloody nice engineering though.
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  #29  
Old 07-10-2010, 02:39 PM
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If you could mount the break disk on the output shafts or half shafts ( and have one on each one ) that would satisfy the MOT and MSVA.

Same as the jag setup
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Old 07-10-2010, 05:38 PM
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If you could mount the break disk on the output shafts or half shafts ( and have one on each one ) that would satisfy the MOT and MSVA.

Same as the jag setup
Jag and Citroen stopped using inboard disks when type approval came in.
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